1916.] NATURAL SCIENCES OF PHILADELPHIA. 507 



ish black, the dorso-pleural membranes a little brighter. Halteres 

 short, dull yellow throughout, the knobs elongate. Legs with the 

 coxae brown, the trochanters yellowish brown; femora and tibiae 

 dark brown, the former a little brighter at the base; tarsi light brown,, 

 the tips of the segments and all of the terminal two segments darker.. 

 Wings with a dusky suffusion, the costal and stigmal regions a little 

 more suffused; veins dark brown. Venation (Plate XXVII, fig. 38): 

 first deflection of R 2 elongate, oblique, not perpendicular as in ursinus 

 (Plate XXVII, fig. 39) ; fusion of M 3 and Cu x slight, shorter than the 

 free portion of Gu\ alone. 



Abdomen dark brownish black with a long pale pubescence. 

 Hypopygium narrowed, the ventral appendage very long, slender, 

 acicular and almost straight, heavily chitinized. 



Habitat.- — Eastern United States. 



Holotype, d 71 , Ashland, Camden County, New Jersey, May 13, 

 1905. 



Type in the collection of the United States National Museum. 



This species occurred in the United States National Museum 

 collection, bearing the label U M. ursinus f" in Coquillett's writing. 

 M. ursinus Osten Sacken, probably the smallest crane-fly in the 

 United States (wing of the male, 2.4 mm.), is the only species with 

 which it might be confused; the venation of the two species is quite 

 distinct, that of the new species being much more of the normal 

 Molophilus type. M. ursinus (Plate XXVII, fig. 39) has the upward 

 deflection of R 2 almost perpendicular and in a line with the radial 

 cross-vein; basal deflection of Cui before the fork of M, the fusion of 

 Cui and M 3 being correspondingly extensive, longer than the free 

 portion of Cui alone; there is a clear, hyaline area running along the- 

 anterior face of vein M, this obliterating the base of M 1+2 ; M. nova- 

 ccesariensis (Plate XXVII, fig. 38) has the upward deflection of R 2 . 

 elongate, oblique; basal deflection of Cui about at the fork of M, the 

 fusion of Cui and M 3 being very slight, not more than one-half the 

 free portion of Cui alone; there is no hyaline obliterative mark along, 

 vein M and the base of M , +2 is distinct. 



EMPEDOMORPHA gen. n. 



Head with the front broad, the eyes widely separated. Rostrum 

 short. Palpi four-segmented, the segments subequal. Antennae- 

 16-segmented, the second segment not longer and only a little broader 

 than the third; flagellar segments oval with verticils just below 

 mid-length; terminal segments smaller. Legs moderately stout, the? 

 34 



